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Forum Index : Microcontroller and PC projects : Need Help for TIMING (MMBASIC)
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Poppy Guru  Joined: 25/07/2019 Location: GermanyPosts: 486 |
Hi Buddies, Iīm not very experienced in timing so I need a little starting support for this issue  The doorbell shall trigger (via optocoupler) and the MM shall read out a certain order for being a defined code just like Morse or the rhythm of a special melody for opening up the door (via relay) if correctly matching. How would you monitor the bell as an example for something like a SOS signal? ... --- ... or short short short long long long short short short   Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
So the input to the MM will be a regular input ("optocoupler")? I think I would watch for the input to go high and assign the timer value to a variable. Wait for the input to go low and subtract the timer memory variable from the current timer value. Ascertain whether it was a dot or a dash. Proceed accordingly. |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
I need some help with the coding. The hardware or logic is no problem at all. If you or anyone else could give me a code-draft for this SOS example, I know that this actually is quite easy (at least as a flow chart) but working with the timer just confuses me completely.  Just imagine someone is pushing the button and a pin goes high each time, the button will get pushed for SOS and the MM will set another pin high at the end of the attempt, if successfully done without mistakes (like wrong short-long-order or too long or too short) and if not it will "GOTO 10", waiting for another try. Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Sure...confession: Having a birthday pint right now. Bday was yesterday but had to pull an all-nighter. Back to my PC shortly :) |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
'define ins/outs dim Cntr, SOS, ButDuration, Dash as integer Dash = 500 'anything less than Dash is a Dot Cntr = 1 SOS = 0 do if pin(doorbell) = 1 then ButDuration = timer do loop until pin(doorbell)=0 ButDuration = timer - ButDuration select case Cntr case 1 if ButDuration < Dash then SOS = SOS or &H100 case 2 if ButDuration < Dash then SOS = SOS or &H80 case 3 if ButDuration < Dash then SOS = SOS or &H40 case 7 if ButDuration < Dash then SOS = SOS or &H4 case 8 if ButDuration < Dash then SOS = SOS or &H2 case 9 if ButDuration < Dash then SOS = SOS or &H1 end select if Cntr = 9 then if SOS = 455 then'(111000111) 'we got dot-dot-dot-dash-dash-dash-dot-dot-dot 'Set output endif Cntr=1 SOS = 0 else Cntr=Cntr+1 endif endif loop |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Just to be sure that button pushes 4,5 & 6 are valid dashes case 1 if ButDuration < Dash then SOS = SOS or &H100 case 2 if ButDuration < Dash then SOS = SOS or &H80 case 3 if ButDuration < Dash then SOS = SOS or &H40 case 4 if ButDuration < Dash then SOS = SOS or &H20 case 5 if ButDuration < Dash then SOS = SOS or &H10 case 6 if ButDuration < Dash then SOS = SOS or &H8 case 7 if ButDuration < Dash then SOS = SOS or &H4 case 8 if ButDuration < Dash then SOS = SOS or &H2 case 9 if ButDuration < Dash then SOS = SOS or &H1 |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
So ... CONGRATS!  ... and thanks for your support! But it does not hurry at all. Just have some more pints, itīs still weekend!  (What brand?) Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
All craft ales around here and there are a zillion names. Started out with an IPA but I didn't love it so switched to a coffee flavoured stout. I'm a bit old school so didn't like the sound of the coffee but I kept going back for more. I'm actually on-site, working so don't want to go crazy...need to be finished  |
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bigmik Guru Joined: 20/06/2011 Location: AustraliaPosts: 2867 |
Hi Poppy, I am not the best at programming so I cant help much there but wont it annoy the crap out of people in the house if someone is pressing the doorbell button to make a code? Probably better to have the MM monitor the door button then trigger the doorbell if the `code' fails. Kind Regards Mick Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<< |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Not a bad alternative to a full numeric keypad for keyless entry, actually. The code could be anything you want. |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
Damned, I wish a had a fresh stout myself or a cider or a snakebite. I am really lacking an english pub at my place getting anything fresh from the tap.  German beer just is so perfect ... ly boring!  And Sunday Morning is a good time to start up ... or going on!  Hi Mick, first thanks for supporting and it is not only about coding each new thought improving my idea will help! And you are right this would be quite annoying but the case is that I just switch off my doorbell, so it wonīt ring at all, but if someone forgets the key this shall open up alternatively as the one being locked out cannot be recognized from inside anymore. You are right, in case the bell is on, I have not considered this case yet. Probably there should be some initialization to show the MM a code is about to come. If you keep the button pressed then the bell will only ring once, so this wouldnīt be annoying. Perhaps it should be pressed once for a quite long time to start the routine. Some years ago I have just build a more discrete solution using some NE555 and Register Shifters (??? donīt know what those are called, switching further on by each trigger) and it worked fine, that is why I am so confused about the coding, because I am still thinking too much in a hardware way. Andre ... such a GURU? | ||||
| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
This would show the world that there is something to crack! No, itīs not my own house, just rented, so I cannot install anything visible outside, and I rather like the one-button solution for being more elegant. Andre ... such a GURU? | ||||
| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
I should explain this better, the level will stay high as long as the button is pressed but the sound can only be heard once. Just a monostable gong. Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Oh I like the 7-minute Pils. I was staying at the Nurburgring race track hotel, a couple of years ago. One night, in the hotel bar, the beers kept coming and coming without me asking. Turned out that a table of people from Switzerland were convinced that I was James Hetfield and told the bartender to keep serving me on their tab. I wouldn't mind but I don't have a single tattoo  |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
... and "seven is a magic number"!  OK, itīs nice, and perfectly made after the german "Reinheitsgebot", but ... boring! ... but for getting p***ed it does its job! In Belgium you will find so many different flavors! And ... Nothing Else Matters! ... waking up having some will prove far enough beer! Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Good one This happened to the missus when we were on vacation in the US Virgin Islands. She ended up with a Tramp Stamp  |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
"Tramp-Stamped on Virgin Island" Sounds like a title ... ... for a book? or some homemade footage! ... just kidding, earning a kick-out if not stopping ... ... well I better go getting a fresh beer. Still weekend? So for the sake of sedateness back to Topic  :I think I have to reconsider some points from my Doorbell-Monitor and will come back on this right away after I found some more particular time. ... as a Microcontroller offers so many more opportunities than some old fashioned electronics. Andre ... such a GURU? | ||||
| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Yup, the MM brings out the Imagineer. |
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| Poppy Guru Joined: 25/07/2019 Location: GermanyPosts: 486 |
... but this should not derogate the divineness of our holy nectar! Cheers!  Andre ... such a GURU? | ||||
CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 1985 |
hmmm... some part of me is caught up on (one of) Ganssel's de-bounce algorithm where you consatnly shift bits into a byte and look for a specific number to eliminate bounce (i.e. all 1s is *definitely* pressed and all 0s is definitely not pressed... anything in between shows bouncing and to be ignored... but... if you slowed the cycle time right down, it would catch individual presses... I can't get it straight in my head if this is worth exploring or not... if it is then the code would be represented by the binary in a single variable... my gut tells me timing would be fairly critical and so not really a contender but my head just won't let go of it. Have a look at "an alternative" under the "A Counting Algorithm" section near the bottom of this page http://www.ganssle.com/debouncing-pt2.htm I use this for debouncing I like that you just leave it running all the time and simply inspect the variable when you want to know if buttons were pressed. |
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